Mixed tire types

[BruceNorthEast]

<font color="red"> PLEASE see my second post in this thread, can you identify the rear tire types for me? Is it an Ag or some type of R4? -Bruce. </font>

One of the used machines I'm considering has R4s on the front, and what appear to be widebar ag tires on the back.

Anyone ever hear of this/done this on their machines? Any thoughts on it?

Someone pointed out that it might cause trouble due to windup (tires are correct size but due to tread differences the effective circumference & therefore the front versus back turn ratio might be different). But if this is only used when 4WD is needed (i.e. loss of traction) should I be concerned?

I'd prefer R4s all around, as I'd like to do some work near the house, but these don't seem as aggressive as typical R1s.

Could they be a different type of R4?

Thanks in advance.
Bruce.

 

[IH3444]

My backhoe has 14.9 x 24 R4s on the rear, but they are more like an Ag tread R1, with swept back 45 degree angle like an ag tire, but with a large rounded button in the middle to make for a much smoother ride. I'm posting a rear view picture for your viewing pleasure, and any comments. I bought these as blem tires. There was a very slight almost unnotiable area where the side walls are not perfectly smooth. They have been on the hoe since 1988, are 8 ply, and have neve given any trouble. Got em for $165 each, including mounting. I bought new tubes at $25 each, and their she sits, just fine.

 

[natural]

Bruce,

If it is 4 wheel drive or front assist you can not mix tires. the fronts and backs have to drive at the same speed or you will start tearing things up. Some cases the fronts spin a bit faster for turning but on hard surfaces you will rip the drive train up. Even is they are set right even on hard surfaces you will tear the drive up.

Before I buy I would do some more checking and make sure they are right.

murph

 

[IH3444]

Mmmmmm, I disagree, especially from what I have read about front wheel assist. The front wheels I believe on the NHs are to assist, and to do this and also steer they are over driven by about 2% faster. This allows the front wheels to do double duty, assist with traction, as well as pull the tractor into the direction of which it is steered. The proper way to check if this combo will work is to measure the diameter of th R1 tires, and then measure the diameter of the R4s. They maybe so close, that they are fine. I have also seen over and over 4wd tractors with the front R4s worn out, or down, and the rears still look fine. /forums/images/graemlins/smile.gif

 

[thcri]

IH3444,

I have super steer on my TC29D and on hard pavement you best not have that thing in 4 wheel. You can feel the fronts fighting the backs even going straight. When turning the outside front may spin up to 2% faster but the inside will drag and actually even go slower than the outside. My understanding, don't mix the tires, your just asking for trouble.

And if the tractor has been that way for a long time the buyer may just be asking for trouble.


murph

 

[BruceNorthEast]

I've attached an image of the tires (I apologize for the smoke & mirrors guys - I'll be glad to give all the details after I get it home, if I decide to pull the trigger). /forums/images/graemlins/tongue.gif

Can you identify the rear tire type for me? Is it an Ag or some type of R4? -Bruce.
Bruce.

 

[rambler]

I would get the numbers & brand of each pair of tires, & run it past a tire guy. I would be suspicious of this setup being good for the tractor. It should have 0 - 2 % faster front than rear. If it was used a lot with a different ratio, you could have a lot of heat & wear on the $$$$ parts of the drivetrain.

It's rare that different tires will mount on the same rims, or match up properly with each other. You raise a good concern here, good question.

If you want to put it back to matching tires, you may need to buy a set of rims to get you there. Consider that in the price.

Then again, everything might be timed out properly. It's a guess from here. /forums/images/graemlins/smile.gif

--->Paul

 

[mopacman]

Ford in the 70s and 80s used a Ford built rearend and a dana built frontend. theas were not offered in the same gear ratio. Some ratios overdrive the front wheels and some ratios under drove the front wheels. It did not heart the drive train or tires to drive them off road. you could feal the tires bind up when you turned the wheels, but you will feel this in a sharp turn on any 4x4. not many people will change the front and rear tires at the same time. this will cause un even tire size any way. It will tear up the ground more with the uneaven tire size.

 

[oliver28472]

R-1 Ag tire.

 

[IH3444]

On hard pavement why would you have it in 4wd?